Snap-on coupling



FIG. 1 is a front view of a first embodiment of a snap-on coupling showing our new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and

FIG. 7 is a perspective view of front, left side and bottom thereof.

FIG. 8 is a front view of a second embodiment of the snap-on coupling showing our new design;

FIG. 9 is a left side view thereof;

FIG. 10 is a right side view thereof;

FIG. 11 is a rear view thereof;

FIG. 12 is a top plan view thereof;

FIG. 13 is a bottom plan view thereof; and,

FIG. 14 is a perspective view of front, left side and bottom thereof.

The broken line showing illustrates portions of the article and forms no part of the claimed design. 

CLAIM The ornamental design for a snap-on coupling, as shown and described. 